Packing and process of making same.



THOMAS MURPHY, OF CLEVELAND, OHIO..

PACKING AND PROCESS OF MAKING SAME.

Specification of Letters Patent.

Application filed April 27, 1909.

Patented July 20, 1909.

Serial No. 492,547.

To all whom it may concern:

Be it known that I, THOMAS MURPHY, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful l fiprovements in Packings and Processesof l aking Same, of which the following is a specification.

My invention relates to improvements in packings, and process of makingsame, and, more particularly, to that class known as compositionpackings, the primary object of the invention being to produce agenerally improved packing of this class which will be noninflammable incharacter and at the same time free from the objections found topackings of this class now on the market.

The improved packing comprises the following ingredients combined insubstantially the proportions stated, vi z:

Lead 69% Babbitt. 20% Asbestosfiber 7% Cylinderoil 2% Graphite--- 1%%Mica (powdered) It is of great importance to a successful commercialproduct that the above ingredients be uniformly incorporated and somaintained in the compound in substantially the proportions stated. Ithas been found to be a matter of considerabledifliculty to properlyincorporate the graphite ducing the tempprature of the mo en mass untilthe latter egins to assume a granular condition, this initial granularstate being detected by the tendency of the graphite and mica to mix orincorporate with the lead and babbitt. As this granular condition is oneof short duration, the ingredients are vigorously stirred from theinitial appearance of this condition until all the ingredients have beenthoroughly incorporated and reduced to a granular state. 4

Third: Impregnate the asbestos fiber With t the oil and simultaneouslyimpregnate and compact the same with the metallic mixture or the resultof step two in the process until the metallic mixture has beenthoroughly incorporated and united in a pliable mass, the

asbestos fiber forming a binding agent giving a body to the whole. It isof importance that the asbestos fiber be uniformly distributedthroughout the mass, and the impregnating and compacting of the mixturewith the asbestos fiber and oil is preferably performed by adding themetallic mixture to the-latter and manipulating the whole by poundingand kneading with a heavy instrument such as a hammer, or the like,until the whole has been thoroughly mixed and compacted in a'pliablemass.

Having thus described my invention, what I claim and desire to secure byLetters Patent, is

1. The process of making packing, consisting in (1) commingling graphiteand mica; (2) reducing lead v and babbitt to a molten state and thenreducing to a granular state and thoroughly incorporating the result ofone; (3) impregnating and compacting asbestos fiber and oil with theresult of two in a compacted pliable mass.

2. The process of making packing, consisting in (1) thoroughlycommingling graphite and mica; (2) melting together lead and babbitt andadding the result of one, stirring and reducing the temperature of themolten mass to an initial granular condition and then vigorously stirrinuntil the result of one has been thorough ly incorporated and all havebeen reduced to a granular state; (3) impregnating asbestos fiber withoil and simultaneously compacting and impregnating the same with theresult of two until thoroughly incorporated and united in a pliablemass.

3. A packing, comprising molten lead and babbitt reduced to a granularcondition with graphite and mica and incorporated and united with afiller of asbestos fiber and oil in a compact pliable mass insubstantially the proportions specified.

Intestimony whereof I have afiixed my signature, inpresence of twowitnesses,

THOMAS MURPHY.

Witnesses O. O. BILLMAN, Gno. H. BILLMAN.

